package com.heima.wemedia.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.exception.CustException;
import com.heima.common.exception.CustomException;
import com.heima.file.service.FileStorageService;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.threadlocal.WmThreadLocalUtils;
import com.heima.model.wemedia.dtos.WmMaterialDTO;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.service.WmMaterialService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.UUID;

@Service
@Slf4j
public class WmMaterialServiceImpl extends ServiceImpl<WmMaterialMapper, WmMaterial> implements WmMaterialService {
    @Autowired
    FileStorageService fileStorageService;
    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;
    @Autowired
    private WmMaterialMapper wmMaterialMapper;
    @Value("${file.oss.prefix}")
    String prefix;
    @Value("${file.oss.web-site}")
    String webSite;
    @Override
    public ResponseResult uploadPicture(MultipartFile multipartFile) {
        //1.校验参数
        if(multipartFile==null||multipartFile.getSize()==0){
            CustException.cust(AppHttpCodeEnum.PARAM_INVALID,"请上传正确的文件!");
        }
        //当前线程中获取用户ID
        WmUser user = WmThreadLocalUtils.getUser();
        if(user==null){
            CustException.cust(AppHttpCodeEnum.NO_OPERATOR_AUTH);
        }
        String originalFilename = multipartFile.getOriginalFilename();
        if(!checkFileSuffix(originalFilename)){
            CustException.cust(AppHttpCodeEnum.PARAM_INVALID,"请上传正确的素材格式,[jpg,jpeg,png,gif]");
        }
        //2.上传到os
        String fileId = null;
        try {
        String filename = UUID.randomUUID().toString().replace("_", "");
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
            fileId = fileStorageService.store(prefix,filename+suffix,multipartFile.getInputStream());
            log.info("阿里云OSS 文件 fileId: {}",fileId);
        } catch (IOException e) {
            e.printStackTrace();
            log.error("阿里云文件上传失败 uploadPicture error: {}", e);
            CustException.cust(AppHttpCodeEnum.SERVER_ERROR,"服务器繁忙请稍后重试");
        }
        //3.封装数据吧保存到素材库中
        WmMaterial wmMaterial = new WmMaterial();
        wmMaterial.setIsCollection((short)0);
        wmMaterial.setType((short)0);
        wmMaterial.setCreatedTime(new Date());
        // 设置文件id
        wmMaterial.setUrl(fileId);
        wmMaterial.setUserId(user.getId());
        save(wmMaterial);
        // 前端显示
        wmMaterial.setUrl(webSite+fileId);
        // 4 返回结果
        return ResponseResult.okResult(wmMaterial);
    }

    @Override
    public ResponseResult findList(WmMaterialDTO dto) {
        // 1 参数校验
        dto.checkParam();
        // 2 执行业务查询
        LambdaQueryWrapper<WmMaterial> wrapper = new LambdaQueryWrapper<>();
        // 收藏
        if (dto.getIsCollection() != null && dto.getIsCollection() == 1) {
            wrapper.eq(WmMaterial::getIsCollection, dto.getIsCollection());
        }
        // 当前登录用户的素材
        WmUser user = WmThreadLocalUtils.getUser();
        if (user == null) {
            throw new CustomException(AppHttpCodeEnum.NO_OPERATOR_AUTH);
        }
        wrapper.eq(WmMaterial::getUserId, user.getId());
        // 时间倒序
        wrapper.orderByDesc(WmMaterial::getCreatedTime);
        IPage<WmMaterial> pageParam = new Page<>(dto.getPage(), dto.getSize());
        IPage<WmMaterial> resultPage = page(pageParam, wrapper);
        List<WmMaterial> records = resultPage.getRecords();
        for (WmMaterial record : records) {
            record.setUrl(webSite + record.getUrl());
        }
        // 3 封装结果
        PageResponseResult pageResponseResult = new PageResponseResult(dto.getPage(), dto.getSize(), resultPage.getTotal());
        pageResponseResult.setData(records);
        return pageResponseResult;
    }

    @Override
    public ResponseResult delPicture(Integer id) {
        //1.参数判断
        if(id==null){
            CustException.cust(AppHttpCodeEnum.PARAM_INVALID,"参数异常!");
        }
        //2.判断是否为引用状态
        // 判断当前id是否被引用，如果被使用则禁止删除
        WmMaterial wmMaterial = getById(id);
        if(wmMaterial == null){
            CustException.cust(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        LambdaQueryWrapper<WmNewsMaterial> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(WmNewsMaterial::getMaterialId, id);
        Integer count = wmNewsMaterialMapper.selectCount(wrapper);
        if(count > 0){
            CustException.cust( AppHttpCodeEnum.DATA_NOT_ALLOW);
        }
        // 删除素材库
        removeById(id);
        // 删除图片OSS
        fileStorageService.delete(wmMaterial.getUrl());
        // 3 封装结果
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
    /**
     * 收藏与取消收藏
     * @param id
     * @param type
     * @return
     */
    @Override
    public ResponseResult updateStatus(Integer id, Short type) {
    //1.校验数据
        if(id==null){
            CustException.cust(AppHttpCodeEnum.PARAM_INVALID,"参数无效!");
        }
        WmUser user = WmThreadLocalUtils.getUser();
        List<WmMaterial> list = wmMaterialMapper.selectList(Wrappers.<WmMaterial>lambdaQuery().eq(WmMaterial::getUserId, user.getId()));
        int count = 0;
        for (WmMaterial wmMaterial : list) {
            if(id.equals(wmMaterial.getId())){
                count++;
            }
        }
        if(count==0){
            CustException.cust(AppHttpCodeEnum.NO_OPERATOR_AUTH,"只能操作自己的素材!");
        }
        WmMaterial material = getById(id);
        material.setIsCollection(type);
        updateById(material);
        return ResponseResult.okResult();
    }

    /**
     * 检查文件格式 目前仅仅支持jpg  jpeg  png  gif 图片的上传
     * @param path
     * @return
     */

    private boolean checkFileSuffix(String path){
        if(StringUtils.isBlank(path)) return false;
        List<String> allowSuffix = Arrays.asList("jpg", "jpeg", "png", "gif");
        boolean isAllow = false;
        for (String suffix : allowSuffix) {
            if(path.endsWith(suffix)){
                isAllow = true;
                break;
            }
        }
        return isAllow;
    }
}
